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94 lines (74 loc) · 2.37 KB
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// Copyright David Abrahams 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef TO_PYTHON_CONVERTER_DWA200221_HPP
# define TO_PYTHON_CONVERTER_DWA200221_HPP
# include <boost/python/detail/prefix.hpp>
# include <boost/python/converter/registry.hpp>
# include <boost/python/converter/as_to_python_function.hpp>
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
# include <boost/python/converter/pytype_function.hpp>
#endif
# include <boost/python/type_id.hpp>
namespace boost { namespace python {
#if 0 //get_pytype member detection
namespace detail
{
typedef char yes_type;
typedef struct {char a[2]; } no_type;
template<PyTypeObject const * (*f)()> struct test_get_pytype1 { };
template<PyTypeObject * (*f)()> struct test_get_pytype2 { };
template<class T> yes_type tester(test_get_pytype1<&T::get_pytype>*);
template<class T> yes_type tester(test_get_pytype2<&T::get_pytype>*);
template<class T> no_type tester(...);
template<class T>
struct test_get_pytype_base
{
BOOST_STATIC_CONSTANT(bool, value= (sizeof(detail::tester<T>(0)) == sizeof(yes_type)));
};
template<class T>
struct test_get_pytype : boost::mpl::bool_<test_get_pytype_base<T>::value>
{
};
}
#endif
template < class T, class Conversion, bool has_get_pytype=false >
struct to_python_converter
{
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
typedef boost::mpl::bool_<has_get_pytype> HasGetPytype;
static PyTypeObject const* get_pytype_1(boost::mpl::true_ *)
{
return Conversion::get_pytype();
}
static PyTypeObject const* get_pytype_1(boost::mpl::false_ *)
{
return 0;
}
static PyTypeObject const* get_pytype_impl()
{
return get_pytype_1((HasGetPytype*)0);
}
#endif
to_python_converter();
};
//
// implementation
//
template <class T, class Conversion ,bool has_get_pytype>
to_python_converter<T,Conversion, has_get_pytype>::to_python_converter()
{
typedef converter::as_to_python_function<
T, Conversion
> normalized;
converter::registry::insert(
&normalized::convert
, type_id<T>()
#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
, &get_pytype_impl
#endif
);
}
}} // namespace boost::python
#endif // TO_PYTHON_CONVERTER_DWA200221_HPP